Extend consistency check to cover jcr:predecessors and jcr:successors

The current DocumentNodeStore consistency check already has a ReferenceCheck, which is used for jcr:baseVersion, jcr:versionHistory and jcr:uuid properties. The check should be extended to also work with multi-valued reference properties like jcr:predecessors and jcr:successors. At the same time new options for these two properties should be added to the command.